Pneumatic device for operating gas-valves.



N0. 862,931; PATENTED AUG. 13, 1907.

' R. N. OAKMAN. I PNEUMATIC DEVICE FOR OPERATING GAS VALVES.

VAPPLIGATION FILED JUNE 20, 1906.

' lllll awe/whom Wit" zoom PATENT OFFICE.

RICHARD N. OAKMAN, OF BROOKLYN, TEW YORK.

PNEUMATIC DEVICE FOR OPERATING GAS-VALVES.

Specification of Letters Patent.

Patented Aug. 13, 1907.

Application filed June 20,1906. Serial No. 822,551.

To all whom it may concern:

Be it known that I, RICHARD N.. OAKMAN, a citizen of the United States,residing at Brooklyn, in the county of Queens and State of New York,have invented certain new and useful Improvements in Pneumatic-PressureDevices for Operating Gas-Valves, of which the following is aspecification.

This invention relates to devices for producing pneumatic pressure orexhaustion in a conduit to operate a valve for closing or opening a portin a gas burner.

The object of my invention is to provide a convenient and effectivedevice, having improved operating mechanism, for forcing air, or otherfluid, into a piston chamber or exhausting it therefrom to operate avalve adapted to close or open a gas port of a burner in a distancelighting system.

In my device, I provide two push buttons or plungers in a casing, anintermediate vibrating lever engaging with slots in the plungers, apiston on one of the plungers working in an air cylinder having anopening for a pipe connection below the piston, and a cover plate havingopenings, through which project the outer ends of said plungers inresemblance to electric push buttons. The device is neat and compact andadapted to be fastened to the frame of a door or window, or against thewall in any convenient location where it may be manipulated to effectdistance lighting or extinguishment of a gas flame.

The matter constituting my invention will be de lined in the claims.

The details of construction of my improved device are illustrated in theaccompanying drawing, in which,

Figure 1 represents a top plan view. Fig. 2 represents a plan view withthe cover plate removed. Fig. 3 represents a longitudinal section online 22, Fig. 1. Fig. 4 represents a transverse section on line 44,Fig. 1. Fig. 5 represents an elevation of a plunger and piston.

The casing A of my pressure and exhaust device may be made of wood,metal, hard rubber or other suitable material, and is provided in itsupper face at the corners with screw holes a. A cover plate B is securedby screws x passing into the holes a. This cover plate is provided withupper and lower openings 12 and b for the outer ends of the plungers Fand H and form guide ways therefor. There are, preferably formedcentrally the two opposite openings a, extending nearly through thecasing and terminating in smaller openings a for insertion of fasteningscrews for holding the casing to a support. The openings a are madecomparatively large for inserting a screw-driver. A comparatively largeopening 0 is made in one end of the casing extending from the face tothe back thereof for receiving the metallic air cylinder E. Thiscylinder is provided, preferably, at its lower end, with an opening andpipe connection e which is preferably screw-threaded at its outer end,as shown. In the construction shown, the air cylinder E with its pipeconnection, may be inserted in the opening 0 from the back of the casingand the pipe connection 6 will fit up into a notch in the base of thecasing. The cover-plate B makes a sufficient closure for the top of thecylinder E and opening O. In the lower half of the casing is provided asecond opening and guideway D, which preferably extends from the face ofthe casing to the back, as shown in Fig. 3. A longitudinal central slot0 connects the openings 0 and D, as shown in Figs. 2 and 3.

In the air cylinder E is fitted the plunger F and its piston g. Thisplunger and piston are provided with a longitudinal slot f extendingtransversely through the same but stopping some distance below the outerend of the plunger. To the lower end of the piston is applied a packingring or disk 9 which is secured in place by a bottom plate 9 and screwsi, as clearly shown in Fig. 5. In the opening or guideway D is fitted asecond plunger H having, at a suitable distance below its outer end, alongitudinal slot h. In the central longitudinal slot 0 is located thevibrating lever K having a central eye 7: through which is passed atransverse pivotal pin Z supported in holes in the casing, as shown inFig. 4. The ends of this lever K project freely into the slots f and hrespectively of the plungers F and H, as shown in Fig. 3. The ends ofthe lever K will not require a pin or link connection with the plungersbut may bear directly upon the outer walls of the slots, as shown inFig. 3. The piston will work sufficiently tight in its cylinder toremain either in a depressed position or in a retracted position untilit is moved positively by one or the other of the plungers. By means ofthe longitudinal slots f and h in the plungers and the centralconnecting slot 0, the parts may be very readily assembled and then thecover plate D applied to the casing by means of screws 2:, so that theplungers F and H shall project slightly through the same, giving theappearance of electric pushbuttons. The plunger F may be styled thepressure plunger and the plunger H may be styled the exhaust plunger.

When the piston or valve in the burner device is to be closed, theplunger F may be pushed inward, thereby operating the piston to forceair out through the pipe connection e. When said piston or valve is tobe opened, the plunger H may be forced inward, thereby retracting thepiston g and exhausting air from the pisten or valve chamber in theburner device and causing said piston or valve to open the gas port. Itwill be seen that the operation is very simple and convenient and may beperformed by any unskilled person.

Having described my invention, what I claim, and desire to secure byLetters Patent, is,

1. A pressure and exhaust device for operating gas valves, comprising acasing, having two transverse openings or guideways, tw'o plnhgersprovided with longitudinal slots in said guideways, an intermediatelever pivotally mounted on a pin in the casing and having its endsprojecting freely into said slots, an airicylinder having a port andpipe connection in one opening of the casing and a piston on one of theplungers working in said cylinder, substantially as described.

2. A pressure and exhaust device for operating gas valves, comprising acasing having two transverse openings or guideways, a cylinder having atits inner end a port and pipe connection in one of said openings, aslotted plunger having a piston in said cylinder and an outwardlyprojecting end, a second slotted plunger in the other transverseguideway, a vibrating lever pivotally connected to the casing andextending into the slots of said plungers, substantially as described.

3. A pressure and exhaust device for operating gas valves; comprising acasing having two transverse open ings or guideways, and a slotconnecting with the same, a cylinder provided with a bottom port in oneof said transverse openings a slotted plunger provided with a piston insaid cylinder, 21 second slotted plunger in the other transverseguideway and a vibrating lever pivotally connected in said slot of thecasing and engaging in the slots of said plungers, a cover-plate havingopenings through which project the outer ends of said plungers,substantially as described.

In testimony whereof I afiix my signature in presence of two witnesses.

RICHARD N. OAKMAN.

Witnesses M. TURNER, HARRIET SIMON.

